We derive a distance of \(D=1.851 \pm 0.015\)  kpc to M4 (NGC 6121). This distance is slightly larger than the distance of \(D=1.82 \pm 0.04\)  kpc found by [1]} based on three eclipsing binary stars
as well as recent results from RR Lyrae stars [2]}, [3]}, [4]} (see Fig. REF ). Nevertheless their distances are compatible with our distance within the error bars.
The true distance to NGC 6121 is therefore likely somewhere in the range 1.83 to 1.85 kpc, making M4 another cluster whose distance is determined with an accuracy of about 1%.
